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International audienceThis paper reports the results from applying the Cryo2SoniC (Cryobreaking, Sonication, Centrifugation) protocolto some lime mortars sampled from the citadel of Shayzar (Syria). The overall aims of this project are 1) to use the propertiesoffered by high-precision accelerator mass spectrometry (AMS) radiocarbon dating for the evaluation of absolutechronology with its typical robust time constraints (i.e. 25 14C yr), and 2) to apply the dating directly to the citadel structuresin order to prevent possible biasing effects potentially affecting indirect 14C dating on organic materials found at the study site.The analyses presented in this paper have been mainly performed as a preliminary check of the Cryo2SoniC methodology inorder to assess its applicability to this study site by comparing observed mortar results with archaeological expectations aboutthe citadel development phasing and charcoals found encased in mortars. Petrographic and mineralogical thin-section analysesby optical microscopy (TSOM), X-ray powder diffraction (XRD), and scanning electron microscopy plus energy dispersivespectroscopy (SEM/EDS) investigations were carried out for characterization of the mortar samples to verify theoccurrence of some features, related to their production technology, which may introduce dating offsets. The resulting 14C calibratedages were in agreement with the archaeological expectations based on type and stratigraphic site reconstructions, insitu inscriptions, and written sources. Such results showed also a general (with 1 exception) statistical agreement among thecharcoals and the analyzed mortars simultaneously, confirming the archaeological expectations for the Shayzar citadel.Results presented in this paper indicate good accuracy for the applied procedure for chronology reconstruction and highlightthe capability of Cryo2SoniC to further characterize the Shayzar site

14C Mortar Dating: The Case of the Medieval Shayzar Citadel, Syria

¹⁴C Mortar Dating: The Case of the Medieval Shayzar Citadel, Syria